I really recommend this blog posting:
The Lightning Process Didn't Work For me
A refreshing account from a moderate ME sufferer of the methods employed by Lightning Process practitioners. Perhaps the process could help someone suffering from a depression related fatigue but not a real ME sufferer.
Prior to my current remission, as a moderate ME sufferer, my concentration span was frequently limited to a few minutes and, unless the room was darkened and a bed supplied for me to rest on, a few minutes of this positivity gobbledegook would have seen an immediate deterioration in my condition.
Negativity is not the cause of this neurological condition (M.E.) hence the whole premise of the process is invalid so far as ME is concerned.